Levothyroxine and Oral Iron: Drug Interaction Guide

Quick answer: Levothyroxine and Oral Iron have a minor interaction — typically manageable with awareness.

Interaction severity: Minor — typically manageable

How Levothyroxine interacts with Oral Iron

Iron salts chelate levothyroxine in the gastrointestinal tract, reducing absorption.

What you should do

Separate administration by at least 4 hours. Recheck thyroid function if regular combined use begins or stops.

Key facts

Severity

Minor — typically manageable

Mechanism

Iron salts chelate levothyroxine in the gastrointestinal tract, reducing absorption.

Action

Separate administration by at least 4 hours. Recheck thyroid function if regular combined use begins or stops.

Important medical disclaimer: This page provides educational information about drug interactions for general reference. It is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your specific medications with a qualified healthcare provider before starting, stopping, or changing any treatment. About our editorial team.

Frequently asked questions

Can I take Levothyroxine and Oral Iron together?

Usually yes, with awareness. Separate administration by at least 4 hours. Recheck thyroid function if regular combined use begins or stops.

What is the severity of this interaction?

The interaction between Levothyroxine and Oral Iron is classified as Minor — typically manageable. Iron salts chelate levothyroxine in the gastrointestinal tract, reducing absorption.

What should I do if I'm prescribed both?

Separate administration by at least 4 hours. Recheck thyroid function if regular combined use begins or stops. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

Last reviewed: by iMedic Medical Editorial Team. Our editorial process.